Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'High Defination Audio' = '%WINDIR%\HDaudio.exe'
Creates the following files on removable media:
- <Drive name for removable media>:\USBFlash.exe
- <Drive name for removable media>:\Autorun.inf
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DisableNotifications' = '00000001'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List] '%WINDIR%\HDaudio.exe' = '%WINDIR%\HDaudio.exe:*:Enabled:Explorer'
To complicate detection of its presence in the operating system,
blocks the following features:
- System File Checker (SFC)
Creates and executes the following:
- %WINDIR%\HDaudio.exe
Modifies file system :
Creates the following files:
- C:\Autorun.inf
- C:\USBFlash.exe
- %WINDIR%\HDaudio.exe
Sets the 'hidden' attribute to the following files:
- <Drive name for removable media>:\Autorun.inf
- <Drive name for removable media>:\USBFlash.exe
- C:\Autorun.inf
- C:\USBFlash.exe
Deletes the following files:
- %TEMP%\~DFFDB.tmp
Miscellaneous:
Searches for the following windows:
- ClassName: 'Shell_TrayWnd' WindowName: ''